Wayne Rooney remains hopeful that Manchester United can make a "very big" statement by signing Paul Pogba. The 30-year-old remembers the midfielder's physical strength when he trained alongside the Juventus star during his time at Old Trafford and remains hopeful that he can emulate the same, if he joins the Red Devils in the summer transfer window.

The France international left United as a free agent and was signed by Juventus in 2012, where he has won the Serie A title every year. He has established himself as one of the best midfielders in Europe.

Pogba's form for both club and country has seen him being a target for Jose Mourinho's side, while the latter's former club Real Madrid are also looking at the option of signing him, according to ESPN. However, United are set to beat the Champions League winners in re-signing the player for a £100m ($132.5m) world-record transfer fee this summer, reports the Daily Mail.

Rooney remains hopeful that Pogba could return to Old Trafford as he believes the Juventus midfielder has "unfinished business" with the Premier League giants.

"I hope he is going to want to return to United and prove he's a top-class player. If he is excited to play for us, we'll be excited to have him back. I'm sure he'll feel there is unfinished business, and it would be a very big statement by the club if they can make it happen," Rooney told the Daily Mail.

"He was one of those players who, when you trained against him, somehow he would just hurt you. A knee in your side, bump into you, I don't think he meant to do it, but it just happened.

"You didn't even need to get into a tackle. Just go next to him and you'd find an elbow or some other sharp bit. So, if he comes, I'm looking forward to that again! But he had great ability, some of the things he could do, and he's gone up a level since he left us."

Mourinho has seen his side complete three signings this summer as United have added defender Eric Bailly, striker Zlatan Ibrahimovic and midfielder Henrikh Mkhitaryan. The Portuguese tactician earlier admitted that he is looking at signing four specialist players in the current window and should Pogba move to England, he will be the fourth addition of this summer.